摘要
Abstract
The L27 block in Wangpanshan is in the late stage of development,facing issues such as rapid production decline,poor water injection development effects,and an increase in flooded wells,which have made it more challenging to maintain stable oilfield development.This paper integrates well logging,lithology,production data,and other information to identify the development of interbeds within the reservoir,conducts detailed sublayer division,and analyzes the horizontal and vertical contact relationships of single sand bodies and their impact on the water drive development effect of the reservoir.The results show that the contact modes of single sand bodies in the study area are vertically classified into three types:separated,superimposed,and cut-stacked.they are classified the lateral contact modes of single sand bodies into isolated,docking,and side-cut types.The separated contact relationship accounts for the highest proportion vertically,while the side-cut contact mode is the most prevalent horizontally in the main sublayers Chang 4+522 and Chang 61.The vertical contact mode of single sand bodies affects the effective water injection sand body thickness in water wells,which in turn influences the degree of water drive utilization.Among them,the cut-and-superimposed mode exhibits the highest degree of water drive utilization,followed by the superimposed mode,and the separated mode performs the worst.The horizontal contact relationship affects the degree of inter-well connectivity,with the connectivity increasing in the order of isolated,butt-jointed,and side-cut contact modes,leading to better effects of water injection development.Studying the contact relationships of single sand bodies is conducive to the stable and efficient development of oilfields and provides guidance for subsequent single sand body division and water drive development in the L27 block.关键词
单砂体/接触关系/水驱动用程度/低渗油藏Key words
single sand bodies/contact relationships/producing degree of water flooding/low permeability reservoir分类
经济学
